Quantum Computing Using Optics
Definition of the Subject
Quantum computation is a new approach to information processing based on physical devices that operate according to the quantum principles of superposition and unitary evolution (Deutsch 1985; Feynman 1982). This enables more efficient algorithms than are available for a computer operating according to classical principles, the most significant of which is Shor’s efficient algorithm for finding the prime factors of a large integer (Shor 1994). There is no known efficient algorithm for this task on conventional computing hardware.
Optical implementations of quantum computing have largely focused on encoding quantum information using single-photon states of light. For example, a single photon could be excited to one of two carefully defined orthogonal mode functions of the field with different momentum directions. However, as optical photons do not interact with each other directly, physical devices that enable one encoded bit of information to unitarily change...
KeywordsEntangle State Beam Splitter Quantum Computation Gate Operation Quantum Memory
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